std: Expand the area of std::fs

This commit is an implementation of [RFC 1044][rfc] which adds additional
surface area to the `std::fs` module. All new APIs are `#[unstable]` behind
assorted feature names for each one.

[rfc]: https://github.com/rust-lang/rfcs/pull/1044

The new APIs added are:

* `fs::canonicalize` - bindings to `realpath` on unix and
  `GetFinalPathNameByHandle` on windows.
* `fs::symlink_metadata` - similar to `lstat` on unix
* `fs::FileType` and accessor methods as `is_{file,dir,symlink}`
* `fs::Metadata::file_type` - accessor for the raw file type
* `fs::DirEntry::metadata` - acquisition of metadata which is free on Windows
  but requires a syscall on unix.
* `fs::DirEntry::file_type` - access the file type which may not require a
  syscall on most platforms.
* `fs::DirEntry::file_name` - access just the file name without leading
  components.
* `fs::PathExt::symlink_metadata` - convenience method for the top-level
  function.
* `fs::PathExt::canonicalize` - convenience method for the top-level
  function.
* `fs::PathExt::read_link` - convenience method for the top-level
  function.
* `fs::PathExt::read_dir` - convenience method for the top-level
  function.
* `std::os::raw` - type definitions for raw OS/C types available on all
  platforms.
* `std::os::$platform` - new modules have been added for all currently supported
  platforms (e.g. those more specific than just `unix`).
* `std::os::$platform::raw` - platform-specific type definitions. These modules
  are populated with the bare essentials necessary for lowing I/O types into
  their raw representations, and currently largely consist of the `stat`
  definition for unix platforms.

This commit also deprecates `Metadata::{modified, accessed}` in favor of
inspecting the raw representations via the lowering methods of `Metadata`.

1 files changed, 50 insertions, 0 deletions

diff --git a/src/libstd/os/freebsd/raw.rs b/src/libstd/os/freebsd/raw.rs
new file mode 100644
index 00000000000..a810eff45d3
--- /dev/null
+++ b/src/libstd/os/freebsd/raw.rs
@@ -0,0 +1,50 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! FreeBSD-specific raw type definitions
+
+use os::raw::c_long;
+use os::unix::raw::{uid_t, gid_t, pid_t};
+
+pub type blkcnt_t = i64;
+pub type blksize_t = i64;
+pub type dev_t = u32;
+pub type fflags_t = u32;
+pub type ino_t = u32;
+pub type mode_t = u16;
+pub type nlink_t = u16;
+pub type off_t = i64;
+pub type time_t = i64;
+
+#[repr(C)]
+pub struct stat {
+    pub st_dev: dev_t,
+    pub st_ino: ino_t,
+    pub st_mode: mode_t,
+    pub st_nlink: nlink_t,
+    pub st_uid: uid_t,
+    pub st_gid: gid_t,
+    pub st_rdev: dev_t,
+    pub st_atime: time_t,
+    pub st_atime_nsec: c_long,
+    pub st_mtime: time_t,
+    pub st_mtime_nsec: c_long,
+    pub st_ctime: time_t,
+    pub st_ctime_nsec: c_long,
+    pub st_size: off_t,
+    pub st_blocks: blkcnt_t,
+    pub st_blksize: blksize_t,
+    pub st_flags: fflags_t,
+    pub st_gen: u32,
+    pub st_lspare: i32,
+    pub st_birthtime: time_t,
+    pub st_birthtime_nsec: c_long,
+    pub __unused: [u8; 2],
+}